<form method="post">
    <label>请输入下载密码：</label>
    <input type="text" name="password" />
    <input type="submit" value="提交" />
    <{if isset($e)}>
    <br/><font color="red" size="3">您输入的下载密码错误，请重新输入</form>
    <{/if}>
</form>